Take the South Dakota Hidden Gem Road Trip Spring will (officially) be here next week. Why not celebrate with a road trip across the state of South Dakota? Well, as it turns out, Only in Your State created their version of the perfect South Dakota road trip, minus all of the hotspots tourists flock to every year, like Mount Rushmore, Crazy Horse, Wall Drug, etc... This one is all about South Dakota's hidden gems. First off, you begin the road trip in northeastern South Dakota, at the Nicolett Tower in Sisseton. The tower also has an interpretative center along with it, that tells the tower's history.